- "Koivu, Lisa" <Lisa.Koivu_at_Cendant-TRG.com> wrote:
> Hi Paul,=20
>
> Thanks for your reply and for the link. I am not
> using
> pga_aggregate_target any longer. It was a mess.
> Instead I am tweaking
> down sort_area_size. It's at 1MB right now.
>
> The bottom line is we have all this memory, the
> loads want to run
> screaming parallel, and I need to find the right
> config to do so.
>
> When sga_max_size is at or over 1800m, I get 12500's
> and failed
> sessions.
>
> When the loads run under choose, hash joins begin
> and ora-4030's start
> happening. First_Rows takes care of this, but
> hashing is faster, and I
> do have memory to support it. I just have to config
> it correctly.
>
> Choose + big sga_max_size = Monkey Hunting.
>
> When I bring sga_max_size down and set first_rows,
> everything seems
> happy for the time being. However, it's going to
> change fast and I'll
> have to pursue VLM.
>
> If you read note 225349.1 it states, "What the PAE
> switch allows you to
> do from the Oracle perspective is to increase the
> amount of memory that
> can be used for the Oracle Database Block Buffer
> Cache. It is important
> to note that this additional memory can ONLY be used
> by Oracle in the
> form of an increased value for DB_BLOCK_BUFFERS."
> This makes me wonder
> if it's even worth pursuing. My cache is only set
> around 50m or so.
>
> Thoughts? I'll have to dig through the Microsoft
> link and links given
> on that page in more detail when I don't have people
> breathing down my
> neck. Hey, I may even learn something about
> Windows.
>
> Thanks again, Paul
> Lisa
<snip>
Lisa,
I think that if you get large memory support working,
not /PAE, just /3GB, you'll probably have enough
headroom. 2.7 GB for the oracle.exe will hopefully be
sufficient.
Can you set a logon trigger for your loads, to set the
hash_area_size, sort_area_size to larger values for
the loads, and have the defaults be small for all
other users?
Paul
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Received on Wed Feb 18 2004 - 17:55:50 CST
